engel



2 Sheets-Shet 1,.

-(No Model.)

P. ENGEL 8v WAGNER.

LEATHER SKIVING MACHINE.

No. 367,709. Patented; Aug. 2 1887.

Ig YENTOR 434 BY Jlwnw ATTORNEYS (No Model.) 2 Sheets-Sheet 2. I. ENGEL& G. WAGNER.

LEATHER SKIVING MACHINE.

Patented Aug. 2, 1887.

' I x Q s g v; a WITNESSES: IN YBNTO ATTORNEYS.

N PETERS. PhohrLHhoguphur. Washington. m6.

UNITED STATES PATENT OFFICE.

FRITZ ENGEL, or wonMs, ON THE RHINE, AND CARL WAGNER, OF OFFEN- EACH, ONTHE 1\IAIN, GERI1\IANY.

LEATHER-SKIVING MACHINE.

SPECIFICATION forming part of Letters Patent No. 367,709, dated August2, 1887.

Application tiled Octoberlii. 1836. Serial No. 216,314. (No model.)

' 1:) new and improved machine for skiving the edges of leather or forthinning other portions of the surface of a sheet of leather, and whichis specially adapted for the use of saddlers, trunk-makers,book-binders, and others using I leather in man ufacturing variousarticles.

The invention consists of various parts and details and combinations ofthe same, as will be fully described hereinafter,and then pointed out inthe claims.

.teference is to be had to the ac ompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in both figures.

Figurel is'a front elevation of our improvement, and Fig. 2 is a sideelevation of the same, parts being in section.

On the base or bed plate A is mounted a standard, B, of suitableconstruction and provided with a driving-wheel, O, rotated by c suitablemeans. The wheel or pulley O is used as a crank-disk, and connects bythe rod I) with the crankarm E,secured on the oseillating shaft F,mounted in suitable bearings on the standard B and carrying on itsfrontend the crank-arm G, which operates the arm H,

connected with the guidearm l,sliding verticall y in suitable bearingson the said standard 13 and provided with the knife J, adjustablysecured to the said guide-arm I. The crankarm K is also secured to thesaid oscillating shaft F, and connects by the links L and L with thelevers M and M, respectively, of which the lever M connects by the rod 0with the bell-crank lever I one arm, 1", of which 5 operates on the pinsecured to the plate Q,

sliding sidewise in the guide Qf, formed on the standard B and carryingthe vertical feedbar R, having a lug or pin, It, in its front, on whichoperates the arm S of the lever S. con- 5o nected by the rod T with thelever M. A spring-rod, U, operates against one edge of the sliding plateQ, and a similar spring-rod, U, presses against the upper end of thefeed bar R, the foot It of which is provided with teeth and restsdirectly above a-table, R.

A segmental support, V, is located below the feedbar R in front of theknife J, and is mounted on the shaft V, having its bearing in the frame\V, adapted to slide in the keeper A, attached to the bedplate A. Theframe V is moved forward and backward by turning the hand-wheel \V,secured to the shaft screwing iu the frame \V.

The shaft V is provided with the segmental gearwheel V which meshes intothe worm V, formed on the shaft V, provided on its outer end with thehand-wheel V.

The links 0 and T are adjusted at their lower ends on their respectivelovers 1? and S.

The operation is as follows: The rotary motion of the pulley O impartsan oscillating motion ,to the shaft F, which oscillates the distance ofone-quarter revolution. The movement of the shaft F imparts a verticalreciprocating movement to the knife J by means of the crank-arm G andthe connecting-arm H. The shaft F also imparts a sidewise motion to theplate Q, carrying the feed-bar R, by means of the crank-arm K, acting onthe lever M,

which, by means of the link 0, aetuates the lever 1?, the arm P of whichoperates on the pin Q of the said plate Q. A vertical motion is impartedto the feed-bar R from the main shaft F by means of the crank-arm K,actuating the lever M, which, by means of the link T, imparts motion tothe lever S, and the latter, by means of its arm S, acting on the pin Itof the feed-bar, raises the latter. The return movement of the plate Q,is accomplished by the spring-rod U, and the downward motion of thefeed-bar R is accomplished by the spring-rod U. The leather to be skivedor thinned on its edges is placed upon the table It, with the portion tobe skived or thinned depending in front of and held against thesegmental support V, and the knife J, in descending, cuts the leatheraccording to the position which the support V holds in relation to theknife J. This position of the support V is regulated by turning thewheels 7' and V of which the former causes a forward and backward motionof the said support and the latter a revolving motion, by which theangle of presentation of the outer vertical face of the said support isvaried to the plane of movement of the knife, according to the extent ofthe surface of the leather to be skived or thinned.

Having thus fully described our invention, we claim as new and desire tosecure by Letters Patent- 1. The combination, with the vertieally-reciprocating knife J, of the feed-bar R, the segmental support V, andmeans for impartinga forward and backward motion to the said support,substantially as shown and described.

2. The combination, with the knife J, adjustably secured to the verticalrod I, sliding in suitable bearings, of the arm H, connected with thesaid rod I, the crank-arm G, operating on the said arm H, the shaft F,carrying the said crank-arm, the crank-arm E, secured to the said shaftF, the link D, attached by one end to the said crank-arm E, and therotating pulley O, acting as a crank-disk for the said link D andimparting an oscillating motion to the shaft F, substantially as shownand described. 7

3. Thecombinatioinwith thefeed-barR,supported by the sidewise-slidingplate Q, having the pin Q, of the bell-crank lever P, connected by thelink 0 with the lever M, means for imparting a rocking motion to thesaid lever M from the oscillating shaft F, and the lever S, operatingwith its bent arm S on the pin R, of the feed-bar It, the lever M,connected by the link T with the said lever S, and means for imparting arocking motion to the said lever M from the main oscillating shaft F,substantially as shown and described.

4. The combination, with the segmental support V, attached to the shaftV, of the frame \V, supporting the said shaft V, and the screwshaft V,screwing in the said frame NV and carrying the hand-wheel XV,substantially as shown and described.

5. The segmental support V, mounted on the shaft V, having its bearingon the frame WV, in combination with the segmental gearwheel V attachedto the said shaft V, the worm V meshing into the said wheel V, the shaftV, carrying the said worm, and the handwheel V, attached to the saidshaft V", substantially as shown and described.

"6. In a machine for skiving, paring, or

thinning leather at the edges, the knife-actuating mechanism consistingof the connectingrod D, crank E, shaft F, and the crank or arms G and H,in combination with the sliding bar I, carrying the adjustable knife J,substantially as and for the purpose set forth.

7. The feed-bar R, in combination with the shaft F, the links L and L,levers M and M, the links 0 and T, the levers S and P, and thespring-rods U and U, all effecting a feed motion of the feed-bar It insuch a manner that at each up and down movement of the knife it risesfrom the leather, passes back laterally,

movesdown upon the leather and pushes the latter forward, substantiallyas shown and described.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

FRITZ ENGEL.

-. CARL VAGNER.

Vitnesses for Fritz Engel:

ALVESTQS. HocUn,

J HAN GRUND. lVitnesses for Carl Vagner:

J osnrrr PATRICK,

G. Diinnsrnm.

